Anomalous influence of electrode width on the critical current of Nb/Au Josephson junctions
Year: 2024
Type: article
Abstract: We study the effect of electrode width on superconducting current transport in Nb–Au–Nb Josephson bridges. The critical current as well as the normal bridge resistance drop with decreasing electrode width on scales of a few μ m , which are orders of magnitude larger than the estimated coherence length of the Au strip. We consider several physical reasons for such an anomalous influence of the width W of the superconducting electrode on the critical current I c (AIWIc) and provide model fits for the resistive and superconducting properties of the bridges. The smooth dependence of the Nb–Au–Nb bridge parameters on the electrode width can be used to optimize the design of superconducting devices for specific applications.
Authors: O V Skryabina, S V Bakurskiy, V I Ruzhickiy, A Shishkin, N V Klenov, I I Soloviev, M Yu Kupriyanov, V S Stolyarov
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Awards: G4939713302, G6444257319, G926928137
OpenAlex ID: W4404311308